DSpace Collection:http://www.openstarts.units.it:80/dspace/handle/10077/5805
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European Transport / Trasporti Europeihttp://www.openstarts.units.it:80/dspace/handle/10077/5847
Title: European Transport / Trasporti Europei
Type: Fascicolo rivistaThu, 01 Jan 2004 00:00:00 GMThttp://www.openstarts.units.it:80/dspace/handle/10077/58472004-01-01T00:00:00ZModeling Traffic Impact of Flyover at an Urban Intersection Under Mixed Traffic Environmenthttp://www.openstarts.units.it:80/dspace/handle/10077/5846
Title: Modeling Traffic Impact of Flyover at an Urban Intersection Under Mixed Traffic Environment
Authors: Maitra, B.; Azmi, M.; Kumar, N.; Sarkar, J. R.
Abstract: In order to ease transportation problems, many urban authorities in India have taken up initiative for
construction of flyovers at major intersections. However, in most of the cases a comprehensive planning
approach has not been adopted, either due to lack of fund or ignorance about the planning perspective of
such proposals. The locations for flyovers have been decided based on present day operating conditions
and the traffic impacts of such flyovers at adjacent intersections have not been analysed. In the present
paper, the traffic impact of a flyover along with its adjacent intersection has been analysed, using a
simulation model developed for mixed traffic operations and poor lane discipline prevailing in India.
Through the case study presented in the paper, it has been demonstrated that an ill planned flyover only
shifts the location of the problem without bringing any benefit to traffic. The potential use of simulation
model for analyzing traffic impacts has been shown; and the need for such analysis for the planning of
flyovers has been highlighted.
Type: ArticoloThu, 01 Jan 2004 00:00:00 GMThttp://www.openstarts.units.it:80/dspace/handle/10077/58462004-01-01T00:00:00ZModeling of Congestion: A Tool for Urban Traffic Management in Developing Countrieshttp://www.openstarts.units.it:80/dspace/handle/10077/5845
Title: Modeling of Congestion: A Tool for Urban Traffic Management in Developing Countries
Authors: Maitra, B.; Sikdar, P.K.; Dhingra, S.L.
Abstract: In order to formulate rational traffic management measures for urban roads, it is essential to understand
the effect of different types of vehicle on congestion. The effect of different types of vehicle on
congestion has been captured on the basis of marginal congestion. Using congestion models, the marginal
congestions have been estimated for different road widths, traffic compositions and on-street parking
levels. The peak hour vehicular composition and volume level vary for different roads in an urban area.
Therefore, for assessing the operating conditions for different roads based on a comparable quantitative
measure, the marginal congestion caused per Passenger Car Unit (PCU) of mixed traffic stream has been
estimated and denominated ‘Marginal Congestion Index (MCI)’. The use of MCI for prioritization of
management actions for different urban roads is discussed. It is shown that a congestion model explicitly
accounts for the effects of traffic composition and volume level. Therefore, the effect of different types of
vehicles on congestion at all traffic volumes could be estimated using congestion models. Altogether,
modeling of congestion is established as a tool for formulating rational traffic management measures for
urban roads in developing countries.
Type: ArticoloThu, 01 Jan 2004 00:00:00 GMThttp://www.openstarts.units.it:80/dspace/handle/10077/58452004-01-01T00:00:00ZUrbanization and urban transport in india: the search for a policyhttp://www.openstarts.units.it:80/dspace/handle/10077/5844
Title: Urbanization and urban transport in india: the search for a policy
Authors: Padam, Sudarsanam; Singh, Sanjay Kumar
Abstract: Urban population in India has increased significantly from 62 million in 1951 to 285 million in 2001
and is estimated to be around 540 million by the year 2021. In terms of percentage of total population, the
urban population has gone up from 17% in 1951 to 29% in 2001 and is expected to increase up to around
37% by the year 2021. Consequently, the number and size of cities have also increased significantly.
Although circumstances differ considerably across cities in India, certain basic trends which determine
transport demand (such as substantial increase in urban population, household incomes, and industrial and
commercial activities) are the same. These changes have placed heavy demands on urban transport
systems, demand that many Indian cities have been unable to meet.
This paper attempts to highlight the need for a cogent urban transport policy without which there will
be ad hoc interventions. Such interventions, apart from not adding up to a comprehensive approach, will
result in greater confusion. Furthermore, it emphasizes that if there is no worthwhile public transport, it
will still need to be reinvented to promote a better quality of life. The need of the hour is formulation of
an urban transport strategy that is both pragmatic and holistic in its approach.
Type: ArticoloThu, 01 Jan 2004 00:00:00 GMThttp://www.openstarts.units.it:80/dspace/handle/10077/58442004-01-01T00:00:00Z